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38 changes: 21 additions & 17 deletions src/QHull.jl
Original file line number Diff line number Diff line change
Expand Up @@ -18,28 +18,32 @@ function __init__()
end

type Chull{T<:Real}
area::T
equations::Matrix{T}
ndim::Int64
max_bound::Vector{T}
min_bound::Vector{T}
neighbors::Matrix{Int32}
npoints::Int64
nsimplex::Int64
points::Matrix{T}
vertices::Vector{Int}
simplices::Vector{Vector{Int}}
facets::Matrix{T}
simplices::Matrix{Int32}
vertices::Vector{Int32}
volume::T
end

## helper for base-0 / base-1 difference
incone(x) = for i in 1:length(x)
x[i] += 1
end

function chull{T<:Real}(x::Matrix{T})
py = spatial[:ConvexHull](x)
points = convert(Matrix{T}, py["points"])
vertices = convert(Vector{Int}, py["vertices"])
incone(vertices)
simplices = convert(Vector{Vector{Int}}, py["simplices"])
for simplex in simplices
incone(simplex)
end
facets = convert(Matrix{T}, py["equations"])
Chull(points, vertices, simplices, facets)

hull = spatial[:ConvexHull](x)

ch = Chull([hull[field] for field in fieldnames(Chull)]...)

# fix base-0 / base-1 difference
ch.vertices += 1
ch.simplices += 1
ch.neighbors += 1
return ch
end

include("polyhedron.jl")
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6 changes: 3 additions & 3 deletions src/polyhedron.jl
Original file line number Diff line number Diff line change
Expand Up @@ -73,8 +73,8 @@ function qhull{N, T}(h::SimpleVRepresentation{N, T})
ch = chull(V)
V = ch.points[ch.vertices, :]
vnored = SimpleVRepresentation(V)
A = ch.facets[:, 1:N]
b = ch.facets[:, N+1]
A = ch.equations[:, 1:N]
b = ch.equations[:, N+1]
h = SimpleHRepresentation(A, b)
vnored, h
end
Expand All @@ -97,7 +97,7 @@ function qhull{N, T<:Real}(h::SimpleHRepresentation{N, T})
ch = chull(B)
C = ch.points[ch.vertices, :]
hnored = SimpleHRepresentation(C, ones(size(C, 1)))
Vlift = ch.facets
Vlift = ch.equations
nvreps = size(Vlift, 1)
irays = IntSet()
ipoints = IntSet()
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4 changes: 2 additions & 2 deletions test/runtests.jl
Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,9 @@ pts = [-1.0 0;
-1 2]

hull = QHull.chull(pts)
@test hull.vertices == [1, 3, 4, 6, 7]
@test hull.vertices == Int32[1, 3, 4, 6, 7]
@test size(hull.points) == size(pts)
@test hull.simplices == Array{Int,1}[[3,1], [4,3], [6,4], [7,1], [7,6]]
@test hull.simplices == Int32[3 1; 4 3; 6 4; 7 1; 7 6]

## multi-dim
x = randn(1000, 5)
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